Using a pen instead of a mouse includes also using a different pointer. I made a new pointer and I use the left version. Download the right or left version or both. Create in [drive:]\OS2\pointers a new directory, eg "Big Pen Pointer Color" and unzip the file pointerr.zip (right version) in it. The left version goes the same way, only the directory is now called "Big Left Hand Pen Pointer Color", in style as already exists in the \OS2\pointers. Unzip the pointerl.zip file in this directory (left version).
In the mouse settings pointer page you can load the new set, this will be active immediately.